Answer:
B. There is less biodiversity in the high tide zone because the tidal changes make survival difficult.
Explanation:
The high tide and low tide zones are located on the seashore as the ocean water merges with land.
High tide zones are usually covered with water during high ocean tide while low tide zones are always submerged in water.
There is low biodiversity in the high tide zone because the tide here changes rapidly and organisms find it difficult to adapt. Organisms that inhabit here must be welll adapted to withstand peroids of high tides.
The most likely explanation for this phenomena is that this is a result of natural selection.
What actually happened?
When the insecticide was introduced, it killed all of the organisms that were vulnerable to it. However, there was a portion of the population that was immune. Since the immune individuals were the only ones that have survived and left offspring, after some generations in the population of this organism there were only their descendants that have the resistance to the insecticide.
Valves in veins have an anatomic structure similar to semilunar valves of the heart
This is further explained below.
<h3>What are semilunar valves?</h3>
Generally, There are structures that look like pockets and are joined at the point where the pulmonary artery and the aorta exit the ventricles. These structures are called the semilunar valves.
The opening that connects the right ventricle to the pulmonary artery is protected by a valve called the pulmonary valve.
In conclusion, Vein valves have an anatomic structure that is comparable to that of the semilunar valves found in the heart.
Read more about semilunar valves
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